John P Costigan I believe to be related to my dad's side of the family going back to William Patrick or Patrick William Costigan whose parents were William Costigan and Margaret Kennedy. 8 members of this family left Ireland in 1842 headed to USA. Lived there a few years in Waltham, Mass. I believe then moved on to Richmond, Quebec, Canada. John P Costigan's father Patrick William who also went by the name William Patrick returned to the USA and ended up in Rhode Island I believe. Patrick William was they youngest childe of William Costigan and Margaret Kennedy. He lived for a time in Canada with his sister Bridgit Costigan and her husband Patrick Cummiskey, who moved back to the USA as well I believe. I can fill in only a few more details in terms of family if you are interested please email me at email@example.com or firstname.lastname@example.org . Thank you.